|
Consolidated Statements of Operations (Parenthetical) (USD $)
In Millions, except Per Share data, unless otherwise specified |
3 Months Ended | |
|---|---|---|
|
Mar. 31, 2015
|
Mar. 31, 2014
|
|
| Income Statement [Abstract] | ||
| Basic net income per common share (Note 8) | $ 0.84 | $ 0.60 |
| Diluted net income per common share (Note 8) | $ 0.79 | $ 0.56 |
| Basic weighted average shares outstanding | 101.1 | 108.2 |
| Diluted weighted average shares outstanding | 106.6 | 115.0 |